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Category:   OS (UNIX)  >   IBM AIX Vendors:   IBM
IBM AIX NFSv4 Bugs Let Remote and Local Users Access NFSv4 Shares
SecurityTracker Alert ID:  1022958
SecurityTracker URL:  http://securitytracker.com/id/1022958
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Sep 29 2009
Impact:   Disclosure of system information, Disclosure of user information, Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.3, 6.1
Description:   Two vulnerabilities were reported in IBM AIX. A local or remote user can access NFSv4 shares.

A local user can exploit a flaw in the handling of the NFSv4 Kerberos credential cache to access Kerberized AIX NFSv4 shares.

A remote user can exploit a flaw in the nfs_portmon tunable to access AIX NFSv4 shares ostensibly protected by the nfs_portmon tunable.

The following commands are vulnerable:

/usr/sbin/gssd
/usr/lib/drivers/nfs.ext

Anton Lundin reported this vulnerability.

Impact:   A local or remote user can access NFSv4 shares.
Solution:   The vendor has issued a fix (APAR IZ50496, IZ50444, IZ50399, IZ49278, IZ49096, IZ49024).

The vendor's advisories are available at:

http://www.ibm.com/support/docview.wss?uid=isg1IZ50496
http://www.ibm.com/support/docview.wss?uid=isg1IZ50444
http://www.ibm.com/support/docview.wss?uid=isg1IZ50399
http://www.ibm.com/support/docview.wss?uid=isg1IZ49278
http://www.ibm.com/support/docview.wss?uid=isg1IZ49096
http://www.ibm.com/support/docview.wss?uid=isg1IZ49024
http://aix.software.ibm.com/aix/efixes/security/nfs4_advisory.asc

Vendor URL:  aix.software.ibm.com/aix/efixes/security/nfs4_advisory.asc (Links to External Site)
Cause:   Access control error

Message History:   None.


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